Toro Groundsmaster 4500-D Series Service Manual page 183

Procedure for Engine Cooling Fan Circuit Test (continued)
Groundsmaster ® 4500-D/4700-D
19245SL Rev A
Note: If pressure and fan speed are both low and the final gear pump section
flow proves to be correct (see
Gauge & Flow Meter) (page
are leaking or faulty (see
that fan motor is worn or damaged.
8. When testing is complete, remove pressure gauge from manifold fitting and
reconnect wire harness to proportional relief valve solenoid. Lower and
secure hood.
Gear Pump Flow (Using Tester with Pressure
5–82)), suspect that seals in fan control manifold
Fan Control Manifold Service (page
Page 5–81
5–154)) or
Hydraulic System: Testing